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  • How to get the most from your A/C -- Tips and tricks in our blog

Our services

24/7 Emergency Services
Get the help you need when you need it most. Our technicians are on call 24 hours to handle any problems at anytime.

For Statewide Emergency Services, please call (808)848-0156 to speak with a live customer service representative.
Fast Response Time
Our team of technicians, estimators, project managers, and engineers are foundation to the largest a/c service department in Hawaii. With fully staffed offices on the islands of Oahu, Maui, Kauai, and Hawaii (Hilo & Kona), help is just a phone call away.
Service, Repair, Replace
We work with ALL types of equipment:
  • Window Units
  • Ductless Splits
  • Packaged Units
  • Cooling Towers
  • Exhaust Fans
  • Heat Pumps
  • Pumps
  • Backflow Testing
  • Domestic Water Pumps
  • Chillers (Reciprocating, Centrifugal, Screw)
  • And More!
Design Build
From complex installations to simple solutions, get a custom tailored system that meets your needs and your budget.

Oahu Air Conditioning Service, Inc

Oahu Air Conditioning Service (OACS) provides the highest quality air conditioning service to commercial customers of all sizes. We provide preventative maintenance and repair services to office buildings, hotels, condominium associations, banks, shopping centers, airports, hospitals, and various state and government buildings throughout Hawaii.

Oahu Air Conditioning Service is also known for its high quality service and customer satisfaction. Our highly trained technicians will help to extend your equipments useful life. With our experience and specialized factory training, we are able to diagnose problems quickly and efficiently.

Featured projects

OACS and OPSM are full-service mechanical companies specializing in all types of commercial heating, ventilation, air conditioning, plumbing, and sheet metal services. Here are a few of the projects we have worked on: